New Hampshire, 2017

Flood in New Hampshire, April 12 to 14, 2017

April 12 to 14, 2017 · NWS GYX · 1 event in 1 county or zone

High pressure off the Atlantic coast caused a mild southwesterly flow across the state with high temperatures climbing to the 70s and lower 80s. The mild air caused melting snow in the headwaters of many of the rivers which caused minor flooding on the Connecticut River at Dalton.

Where it happened

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS GYX wrote it up.

High pressure off the Atlantic coast caused a mild southwesterly flow across the state with high temperatures climbing to the 70s and lower 80s. The mild air caused melting snow in the headwaters of many of the rivers which caused minor flooding on the Connecticut River at Dalton.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Gray, ME wrote its last area forecast discussion before the first event at Apr 12, 2:09 PM EST, 1 hour 22 minutes earlier.

Area forecast discussion, Apr 12, 2:09 PM EST, 1 hour 22 minutes before
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The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 flood. Local standard time, as filed.

Flood, Coos

When
April 12, 3:31 PM EST to April 14, 7:37 PM EST
Where
Coos County, 0.89 mi N of Dalton to 1.45 mi N of Dalton
Cause
Heavy Rain / Snow Melt
Reported by
Official NWS Observations
Coordinates
44.433, -71.677

With high temperatures in the 70s and 80s, melting snow caused minor flooding on the Connecticut River at Dalton. The river crested at 18.04 feet; flood stage is 17 feet.

What these are

Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in New Hampshire in 2017Every state in 2017This day in weather historyWarnings in New Hampshire, April 2017

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 696221.